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## Homework Statement

[tex]\int(\frac{x}{\sqrt{1-x^{2}}})dx[/tex]

## Homework Equations

## The Attempt at a Solution

My calculator tells me that the answer should be -sqrt(1-x^2) but if I pick u = sqrt(1-x^2), then dx = (sqrt(1-x^2)*du)/x, which leaves me with -integral((sqrt(1-x^2)/u)du), the problem I am having is getting rid of the "ln(u)" in my final answer, any suggestions?